Can somebody please explain to me why the pointy-haired bosses in the Scottish transport office have a fetish for ridiculously low speed limits at roadworks? It’s down to thirty miles an hour on the motorway leading up to the Forth Road Bridge and ten miles an hour on a stretch of the A90 a few miles south of Aberdeen.

I’ve never encountered speed limits that low in comparable situations south of the border, but then again there are other factors at play back home. The sheer volume of traffic on the M25 reduces things to a complete crawl at times, for instance.